Wichita Republican Rep. Steve Brunk has introduced a bill in the House requiring the IQ notification, based on a 2012 Harvard study that found a correlation between slower brain development and increased levels of fluoride in water.

That study focused on children in China, which unlike the U.S. has a high natural presence of fluoride in its water.

Richardson says most anti-fluoride activists either believe fluoride causes cancer or that the government uses it as a mind-control agent.